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net: sxgbe: fix error paths in sxgbe_platform_probe()

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We need to use post-decrement to ensure that irq_dispose_mapping is
also called on priv->rxq[0]->irq_no; moreover, if one of the above for
loops failed already at i==0 (so we reach one of these labels with
that value of i), we'll enter an essentially infinite loop of
out-of-bounds accesses.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rasmus Villemoes 2016-03-26 22:24:09 +01:00 committed by David S. Miller
parent 66391b383b
commit 79c134239d
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c
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@ -155,11 +155,11 @@ static int sxgbe_platform_probe(struct platform_device *pdev)
return 0;
err_rx_irq_unmap:
while (--i)
while (i--)
irq_dispose_mapping(priv->rxq[i]->irq_no);
i = SXGBE_TX_QUEUES;
err_tx_irq_unmap:
while (--i)
while (i--)
irq_dispose_mapping(priv->txq[i]->irq_no);
irq_dispose_mapping(priv->irq);
err_drv_remove: